> ## Documentation Index
> Fetch the complete documentation index at: https://developer.rocket.chat/llms.txt
> Use this file to discover all available pages before exploring further.

# Add Group Owner

> Assign `owner` role for a user in the current private channel. Learn more about roles from the <a href='https://docs.rocket.chat/docs/roles-in-rocketchat' target='_blank'>Roles in Rocket.Chat</a> document.

### Changelog
| Version | Description |
| ------- | ----------- |
| 0.49.4  | Added.      |

## OpenAPI

````json POST /api/v1/groups.addOwner
{
  "openapi": "3.0.0",
  "info": {
    "version": "1.0.0",
    "title": "Rooms"
  },
  "servers": [
    {
      "url": "https://apiexplorer.support.rocket.chat"
    }
  ],
  "tags": [
    {
      "name": "Channels"
    },
    {
      "name": "Directory"
    },
    {
      "name": "Groups"
    },
    {
      "name": "Rooms"
    },
    {
      "name": "Teams"
    },
    {
      "name": "Room Invites"
    },
    {
      "name": "Subscriptions"
    },
    {
      "name": "ABAC"
    }
  ],
  "paths": {
    "/api/v1/groups.addOwner": {
      "post": {
        "tags": [
          "Groups"
        ],
        "summary": "Add Group Owner",
        "description": "Assign `owner` role for a user in the current private channel. Learn more about roles from the <a href='https://docs.rocket.chat/docs/roles-in-rocketchat' target='_blank'>Roles in Rocket.Chat</a> document.\n\n### Changelog\n| Version | Description |\n| ------- | ----------- |\n| 0.49.4  | Added.      |",
        "operationId": "post-api-v1-groups.addOwner",
        "parameters": [
          {
            "$ref": "#/components/parameters/Auth-Token"
          },
          {
            "$ref": "#/components/parameters/UserId"
          }
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "roomId": {
                    "type": "string",
                    "description": "Enter the group's (private channel) ID.",
                    "example": "ByehQjC44FwMeiLbX"
                  },
                  "userId": {
                    "type": "string",
                    "description": "Enter the user's ID.",
                    "example": "nSYqWzZ4GsKTX4dyK"
                  }
                },
                "required": [
                  "roomId",
                  "userId"
                ]
              },
              "examples": {
                "Example": {
                  "value": {
                    "roomId": "ByehQjC44FwMeiLbX",
                    "userId": "nSYqWzZ4GsKTX4dyK"
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "$ref": "#/components/responses/trueSuccess"
          },
          "400": {
            "description": "Bad Request",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "success": {
                      "type": "boolean"
                    },
                    "error": {
                      "type": "string"
                    },
                    "errorType": {
                      "type": "string"
                    }
                  }
                },
                "examples": {
                  "Example 1": {
                    "value": {
                      "success": false,
                      "error": "The required \"roomId\" or \"roomName\" param provided does not match any group [error-room-not-found]",
                      "errorType": "error-room-not-found"
                    }
                  }
                }
              }
            }
          },
          "401": {
            "$ref": "#/components/responses/authorizationError"
          }
        }
      }
    }
  },
  "components": {
    "parameters": {
      "Auth-Token": {
        "name": "X-Auth-Token",
        "in": "header",
        "description": "The `authToken` of the authenticated user.",
        "required": true,
        "schema": {
          "type": "string"
        },
        "example": "RScctEHSmLGZGywfIhWyRpyofhKOiMoUIpimhvheU3f"
      },
      "UserId": {
        "name": "X-User-Id",
        "in": "header",
        "description": "The `userId` of the authenticated user.",
        "required": true,
        "schema": {
          "type": "string"
        },
        "example": "rbAXPnMktTFbNpwtJ"
      }
    },
    "responses": {
      "trueSuccess": {
        "description": "OK",
        "content": {
          "application/json": {
            "schema": {
              "type": "object",
              "properties": {
                "success": {
                  "type": "boolean"
                }
              }
            },
            "examples": {
              "Success": {
                "value": {
                  "success": true
                }
              }
            }
          }
        }
      },
      "authorizationError": {
        "description": "Unauthorized",
        "content": {
          "application/json": {
            "schema": {
              "type": "object",
              "properties": {
                "success": {
                  "type": "boolean"
                },
                "error": {
                  "type": "string"
                }
              }
            },
            "examples": {
              "Authorization Error": {
                "value": {
                  "success": false,
                  "error": "You must be logged in to do this."
                }
              }
            }
          }
        }
      }
    }
  }
}
````